<?php
include_once("model/Book.php");

class Model {
    public function getBookList()
    {
        // here goes some hardcoded values to simulate the database
        return array(
            "Jungle Book" => new Book("Jungle Book", "R. Kipling", "A classic book.","1000"),
            "Moonwalker" => new Book("Moonwalker", "J. Walker", "","2000"),
            "PHP for Dummies" => new Book("PHP for Dummies", "Some Smart Guy", "","3000")
        );
    }

    public function getBook($title)
    {
        // we use the previous function to get all the books and then we return the requested one.
        // in a real life scenario this will be done through a db select command
        $allBooks = $this->getBookList();
        return $allBooks[$title];
    }

} 

?>